Horrendous list of deprecated, missing or old tools/files that you have to use to develop on KaiOS in 2020. This is how I got it working.
- Install Firefox 59 from here: https://ftp.mozilla.org/pub/firefox/releases/59.0/win64/ in a non-standard location
- Immediately go into Firefox Settings and disable automatic-updates or it'll get rid of version 59 after it restarts (you may have to do this several times)
- Unzip ADB Tools to c:\platform-tools and add that to the Windows Path
- Enable Developer mode on your phone "Device > Developer > Debugger > ADB and DevTools" if that menu is visible.
- If Developer menu not visible, type the following on your phone:
*#*#0574#*#*
- And then go into the ADB setting that appears on the screen and enable it
- Then type the following on your phone:
*#*#33284#*#*
to enable developer mode - Plug your phone into your PC with a USB cable and unlock the screen